Free Oral Mucosa MCQs with Answers

• A. None of the above
• B. Smaller than the basal cells
• C. same size as that of basal cells
• D. Larger than the basal cells

Explanation: Spinous-layer keratinocytes are generally larger than basal cells because they enlarge as they move away from the proliferative basal…

• A. Langerhan cell
• B. Merkel cells
• C. Melanocyte
• D. Keratinocyte

Explanation: Langerhans cells are antigen-presenting dendritic cells that provide immune surveillance in the oral epithelium.

• A. Involucrin
• B. Vinculin
• C. Filaggrin
• D. Nectin

Explanation: Keratohyaline granules contain profilaggrin, which is processed into filaggrin; filaggrin helps aggregate keratin filaments during…

• A. Fungiform
• B. Foliate
• C. Circumvallate
• D. Filiform

Explanation: Filiform papillae are slender mechanical papillae covered by heavily keratinized epithelium.

• A. Basal cells and parabasal spinous cells
• B. Granular cell layer
• C. Spinous cells and granular cells
• D. Basal cell layer

Explanation: In oral epithelium, the stratum germinativum includes the proliferative basal cells and the immediately suprabasal parabasal spinous…

• A. Reticular fibers
• B. Hemidesmosomes
• C. Collagen fibers
• D. Desmosomes

Explanation: The junctional epithelium attaches to enamel through an internal basal lamina and hemidesmosomes.

• A. Keratinized
• B. Parakeratinised
• C. Non-keratinized
• D. Orthokeratinized

Explanation: Buccal mucosa is lining mucosa, so it is usually non-keratinized to remain soft and flexible during chewing and speech.

• A. It attached to buccinator muscle in cheeks
• B. It attached to orbicularis oris in lips
• C. None of the above
• D. A & B are correct

Explanation: The buccal mucosa is closely related to the buccinator muscle, while the labial mucosa is related to orbicularis oris.

• A. Stratum basale and parabasal spinous cells
• B. Stratum granulosum
• C. Stratum basale
• D. Stratum spinosum

Explanation: Stratum germinativum includes the basal layer together with the deepest parabasal spinous cells, which continuously generate new…

• A. Taste cells
• B. Sustenticular cells
• C. Von ebner cells
• D. Acini

Explanation: Supporting cells of taste buds are called sustentacular or sustenticular cells and surround the gustatory cells.

• A. Thin lamina and non keratinized mucosa of cheek
• B. Keratinized mucosa of cheek
• C. Rete pegs
• D. Thick lamina propria on skin of cheek

Explanation: Cheek mucosa is thin and non-keratinized, whereas the skin covering the cheek is keratinized and has skin appendages.

• A. Buccal gingiva
• B. Lingual gingiva
• C. Sublingual mucosa (floor of mouth)
• D. Oral surface of lip

Explanation: The floor of the mouth has the thinnest oral epithelium, allowing substances placed sublingually to be absorbed rapidly.

• A. 30% Sebaceous glands
• B. 75% sebaceous glands
• C. Absolutely no sebaceous glands
• D. very small number of sebaceous glands, if any

Explanation: The vermilion or red zone of the lip usually has very few sebaceous glands, and they may be absent.

• A. Gingiva and hard palate
• B. Alveolar mucosa and vestibular fornix
• C. Lip and cheek
• D. Floor of the mouth and soft palate

Explanation: Masticatory mucosa is adapted to withstand friction and covers the gingiva and hard palate.

• A. Papillary layer of dermis
• B. Epidermis
• C. Reticular of dermis
• D. Hypodermis

Explanation: Merkel cells are specialized tactile epithelial cells located in the basal layer of the epidermis.

• A. Attached gingiva
• B. Free gingiva
• C. Gingival sulcus
• D. Interdental papilla

Explanation: The sulcular epithelium lining the gingival sulcus is non-keratinized, unlike the attached gingiva and much of the free gingiva.

• A. Keratinizing cells
• B. Melanocytes
• C. Non-Keratinizing cells
• D. Clear cellsConsult Online Doctors

Explanation: Keratinizing cells, more specifically keratinocytes, migrate toward the surface and ultimately form keratin.

• A. Type I and III collagen
• B. Type IV collagen
• C. Type III collagen
• D. Type I collagenGet Study Guides

Explanation: The lamina densa is a basal lamina containing mainly type IV collagen, which forms its supporting network.

• A. Foliate
• B. Filliform
• C. Circumvallate
• D. Fungiform

Explanation: Circumvallate papillae contain the greatest concentration of taste buds, mainly on their lateral walls.

• A. Eosin & haematoxylin
• B. Carbol fuschin
• C. Cresyl violet
• D. Sudan III

Explanation: Sudan III is a lipid-soluble dye that stains neutral fats in adipose cells.